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Theresa Manganiello December 17, 2013 Osmosis Lab report Bio Honors (Yellow) Creating a Semi-Permeable membrane 1. Define osmosis. The diffusion of water through selectively permeable membranes 2. What is a semi-permeable membrane? â€Å"A semipermeable membrane, also termed a selectively permeable membrane, a partially permeable membrane or a differentially permeable membrane, is a membrane that will allow certain molecules or ions to pass through it by diffusion and occasionally specialized "facilitated diffusion". â€Å" 3. What is dialysis tubing? Dialysis tubing is a type of semi-permeable membrane tubing made from regenerated cellulose or cellophane. It can be used for diffusion with solutes or osmosis if used with water only. 4. What molecules are able to pass through the dialysis tubing? Unable to pass through the dialysis tubing? Selective permeability of dialysis tubing shows ions and molecules can pass through the dialysis tubing. Dialysis tubing is not permeable to starch because starch is too large.. 5. What is distilled water? Distilled water is water that has been purified through a process of heating and cooling. 6. What is the common name for sucrose? Draw a molecule of sucrose. Table Sugar 7. Develop your hypothesis with your lab partner I think that the more time each bag is given, the heavier it will get. So my hypothesis is: In this lab, the bags with sucrose and unknown solution will be heavier than the bags with water, and as time goes on the bags with sucrose will have more mass than the others. Hypothesis In this lab, the bags with sucrose and unknown solution will be heavier than the bags with water, and as time goes on the bags with sucrose will have more mass than the others. Materials - 6 pieces of 15... ...because it reacted in the same way in which the sucrose did. In this lab, I created a model, and observed the model of a semi permeable cell membrane. I thought that the bags with sucrose and unknown solution will be heavier than the bags with water, and as time goes on the bags with sucrose will have more mass than the others. I was able to accept my hypothesis, and prove it true through the lab. Bag one basically stayed the same, and five and six went down. Bags 2-4 all increased drastically in mass, proving my hypothesis. This lab mirrors what some scientists do every day, whether it be creating models, or studying cells. No matter where we go, science will always be with us. Work cited "Animation: How Osmosis Works." Animation: How Osmosis Works. N.p., n.d. Web. 12 Dec. 2013. "Learning By Osmosis." Something to Shout About. N.p., n.d. Web. 17 Dec. 2013.